SR 99 - Alaska Way Viaduct Replacement Tunnel - Seattle, WA - $1.4 Billion

Boring & Drilling

We provide mechanically excavated, shaft drilling services for deep, large-diameter shafts in support of the mine development and underground construction industries. Our capabilities are broad and comprehensive; we can drill shafts vertically, horizontally and at all angles between — in sizes ranging from microscopic holes to roadway tunnels of up to 58 feet in diameter. We can also execute in the most difficult geotechnical and environmental conditions — below the ground water table, in solid rock formations, within inches of an active rail tunnel and in tight underground tolerances.